Tire and method of making the same.



W. H. DUNKEHLEY.

TIRE AND METHOD OF MAKING THE SAME.

APPLICATION FILED APR, 8. 1916.

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Patented Jan. 23, 1917.

rm A or Application files. April 8, 1915.

r 0 cl? whom it may concern;

Be it known that 1, WILLIAM H. Dormermy, a citizen of zlie United States, resicling Peterson, in ilie county of Pessoic and State 01" New Jersey, have invented a certain new and useful improvement in Tires and Methods of Making the Same, of which the following is e specificeiion.

invention releies to annular structures of fabric rubber, of which bicycle and aucomobile tires are examples, and she method oimakiug the some. Such struciures are commonly made by Winding strips of woven fabric in layers upon u suitable form, zilbernazecl iili layers of soft rubber, 2116; the whole vulcanized.

? M v 3 J 1 1 3 cum up it is evioenc-tlie toieeols oi the fabric must lie in the finished article under unequal irains even though rlie strips of fabric be out on bios. This inequality of sroins is mainly due to she difference be 1' vceri the the tread diameters oi :lie tire and cannot be eroidecl in this m thod of coustructiori,

res object or" this invention isto provide annular struc'sure of this type, in which the tension on each tin-earl throughout each layer is uniforni, and the annulus has suffieient inherent stability to enable main coin its form under all conditions, and also to provide each layer wish reinforcing strands extending circiuufererltieliy, ancl lI-o incorporate corals or bonds of rubber or other material along the innerfsce of the annulus at the margins er on inner circumferential opening, in position to be vol-- caiiizecl with the annulus and serve as the usual clenclier flanges or ribs,

The invention consists in the method and novel feoures of construction and arreiigemenf by which the above objects are eltsiiiecl, to be hereinafter described oral pointed out in ch 3 claims.

The accompanying oirawvings form pert his specification.

igure 1 is on elevation, partly in vertical section, showing the improvecl tire in process i manufacture on a braiding machine, with 0 much of the latter as is necessary to show ts operation. 2 is e corresponding plan Specificetion'of Letters Esteem in a tire films fariel No. 88 238.

51s illustraiecl in the drawings lie .bire 15 formed on a collapsible core M, in braiding she fabric layers directly thereon.

A is the iable of the machine having serpentine racer-revs a in which the dolls or spool-ccrriers 'b C are ireversecl by the usual mechanism, cool e. which the annular core is received slowly rotated as the orsiclczl leyer is plied,

i H v 1 s 4- ,w A is a remo sole poi'uiori Gr soccer or mLG table which permits the introduction ilie core and lts removal with the annulus.

core being in position the breicling m is started and lays e broiclecl cove mg or layer F of threads from the spool-carriers v C upon the core, Witlr each "clireacl smoothly delivered under the some tension, of uniform. thickness and Without Wrinkles. Upon "is layer a. coating G of soi rubber is applied, by not shown, coal a seconcl layer F of threads is brsirlerl upon such ceasing, which layer in turn receives its costirig G of rubber, and so on until the quirecl thickness is attained. The co 2 and is annulus is then Withdrawn from the come through the opening provideri, by ills withdrawal of the sector A, the core removed and the re vulcanized and otherwise treated as usual.

in the machine as shown by the full llZlGS in 2, the raceway a does not eompl rely encircle the core out terminates at each in the manner common in braiding, and the clolls C C return in the reverse di rec sion, thus providing e continuous narrow opening m on ills inner feceiof through which the core M may be removed in the collapsed condition.

H H are strong reinforced strands of thread, wire, or other material introduced through hollow standards A. A set in the islands A? A of the raceway, and extending circumferentially of the tire to aid in strengthening the tread portion and resisting radial expansive strains. These strands ll H lie in practically parallel lines around the annulus and are held in place by the braiding threads with which they are incorporated in the layers 1 F A 5 are similar hollow standards in the islands A A at each end of the course followed by the dolls C C. Each delivers a heavy cord J of soft rubber or other materialwhich is braided in at the adjacent margin of the opening on and serves to produce a thickened selvage along such margin, which in vulcanizing is shaped to form a (-lencher flange or rib.

The threads forming the layers are applied smoothly and evenly and under practically uniform tension, a condition best adapted to insure the desired strength, resistance to wear, and resiliency in the finished tire.

I claim 1. The herein described method of forming a circuinferentially divided annulus in one complete continuous operation, which consistsin braiding a plurality of threads in a plurality of layers continuous of each other and maintaining all of the threads under permanent uniform tension one upon the other and simultaneously forming selvages continuous of each other along the edges.

2. The herein described method of "forming a circumferentially divided annulus in one complete continuous operation, which consists in braiding a plurality of threads in a plurality of layers continuous of each other one upon the other and simultaneously forming reinforced sclvages continuous of each other throughout the various layers.

3. The herein described method of making a divided annulus in one complete continuous operation, which consists in braiding a plurality of threads continuous of each other and alternately forming layers of braided threads and-rubber each continuous throughout the annulus and simultaneously embodying in each braided layer a reinforcement at its opposite cdges continuous of each other and throughout the annulus and placing all of the threads permanently under uni-form tension.

at. It tire or analogous annulus composed of layers of, thread all continuous of each other, each layer braided continuously to form an annular fabric having an opening airing its inner face, layers of rubber continuous of each other and alternating with the layers of thread and circumferentially extended cords incorporated in said fabric at the margins of said opening to form sel- \age edges therefor, said cords being continuous of each other and of each thread layer and all of the threads being permanently under uniform tension.

5. A tire or analogous annulus composed of layers of thread all continuous of each other, each layer braided continuously to form an annular fabric having an opening along its inner face, layers of rubber continuous of each other and alternating with the layers of thread and circumferentially extended cords incorporated in said fabric at the margins of said opening to form selvage edges therefor, said cords being continuous of each other and of each thread layer and all of the threads being permanently under uniform tension, and reinforcing strands incorporated with the thread layers and made continuous of each other and with the threads throughout the tire.

6. A permanently-formed braided annulus with all of its threads under uniform tension and comprising a multiplicity of layers of alternating braided thread and rubber, the layers of threads being continuous of each other, said annulus having a circumferential opening, and reinforcements continuous of each other incorporated in said braided layers at opposite edges of said opening.

7. A tire or analogous annulus composed of layers of thread, each layer braided continuously in the form of an annular fabric with a circumferential opening with the threads under uniform tension and alternating with layers of rubber, all of the layers of thread being continuous of each other, and a reinforcing cord for each layer extending circumferentially, the reinforcing cords being continuous of each other and each thread layer.

8. A tire or analogous annulus composed of layers of thread, each layer braided continuously in the form of an annular fabric with the threads under uniform tension and alternating with layers of rubber, all of the layers of thread being continuous of eachother, a reinforcing strand for each layer extending eircumfcrentially, and cords of rubber incorporated with each braided layer along the inner face of the annulus at the margins of an inner circumferential open- 1a,; therein, said cords being continuous of each other and of each thread layer throughout the annulus.

S). A the or analogous annulus composed of layers of thread, eachdayer braided continuously in the form of an annular fabric with the threads under uniform tension and alternating with layers of rubber, all of the other and of the braidsd Myers and W canized' with the annulus and serving as cloncher ribs.

In testimony that E Chaim Hm inve'nl above. set forth M i mix my signature.

WILLEAM H. DUNKE 

